Stopping Sight Distance Calculator

✖Breaking distance is defined as the distance traveled after applying brake till the vehicle stops.ⓘ Breaking Distance [BD]			+10% -10%
✖Lag distance is defined as the distance travelled by the vehicle before applying the break and after seeing the object.ⓘ Lag Distance [LD]			+10% -10%

✖Stopping Sight Distance is defined as distance provided on the road before a sharp turn.ⓘ Stopping Sight Distance [SSD]

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Formula

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Stopping Sight Distance

Formula

`"SSD" = "BD"+"LD"`

Example

`"67.7m"="40m"+"27.7m"`

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Stopping Sight Distance Solution

STEP 0: Pre-Calculation Summary

Formula Used

Stopping Sight Distance = Breaking Distance+Lag Distance
SSD = BD+LD
This formula uses 3 Variables

Variables Used

Stopping Sight Distance - (Measured in Meter) - Stopping Sight Distance is defined as distance provided on the road before a sharp turn.
Breaking Distance - (Measured in Meter) - Breaking distance is defined as the distance traveled after applying brake till the vehicle stops.
Lag Distance - (Measured in Meter) - Lag distance is defined as the distance travelled by the vehicle before applying the break and after seeing the object.

STEP 1: Convert Input(s) to Base Unit

Breaking Distance: 40 Meter --> 40 Meter No Conversion Required
Lag Distance: 27.7 Meter --> 27.7 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

SSD = BD+LD --> 40+27.7

Evaluating ... ...

SSD = 67.7

STEP 3: Convert Result to Output's Unit

67.7 Meter --> No Conversion Required

FINAL ANSWER

67.7 Meter <-- Stopping Sight Distance

(Calculation completed in 00.004 seconds)

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Credits

Created by Rithik Agrawal

National Institute of Technology Karnataka (NITK), Surathkal

Rithik Agrawal has created this Calculator and 1300+ more calculators!

Verified by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

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< 7 SSD Calculators

Stopping Sight Distance on Level Ground with Breaking Efficiency

Go Stopping Sight Distance = Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction*Overall Efficiency from Shaft A to X)

Stopping Sight Distance on Upward Inclined Surface

Go Stopping Sight Distance = Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction+Difference in Elevation)

Total Reaction Time given Stopping Sight Distance

Go Break Reaction Time = (Stopping Sight Distance-(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction))/Speed of Slow moving vehicle

Stopping Sight Distance for Velocity in meter per second

Go Stopping Sight Distance = Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction)

Stopping Sight Distance

Go Stopping Sight Distance = Breaking Distance+Lag Distance

Stopping Sight Distance given Intermediate Sight Distance

Go Stopping Sight Distance = Intermediate Sight Distance/2

Intermediate Sight Distance

Go Intermediate Sight Distance = 2*Stopping Sight Distance

Stopping Sight Distance Formula

Stopping Sight Distance = Breaking Distance+Lag Distance
SSD = BD+LD

What is stopping sight distance?

Stopping sight distance (SSD) is the minimum sight distance available on a highway at any spot having sufficient length to enable the driver to stop a vehicle traveling at design speed, safely without collision with any other obstruction.

How to Calculate Stopping Sight Distance?

Stopping Sight Distance calculator uses Stopping Sight Distance = Breaking Distance+Lag Distance to calculate the Stopping Sight Distance, The Stopping Sight Distance formula is defined as the minimum sight distance available on a highway at any spot having sufficient length to enable the driver to stop a vehicle traveling at design speed, safely without collision with any other obstruction. Stopping Sight Distance is denoted by SSD symbol.

How to calculate Stopping Sight Distance using this online calculator? To use this online calculator for Stopping Sight Distance, enter Breaking Distance (BD) & Lag Distance (LD) and hit the calculate button. Here is how the Stopping Sight Distance calculation can be explained with given input values -> 67.7 = 40+27.7.

FAQ

What is Stopping Sight Distance?

The Stopping Sight Distance formula is defined as the minimum sight distance available on a highway at any spot having sufficient length to enable the driver to stop a vehicle traveling at design speed, safely without collision with any other obstruction and is represented as SSD = BD+LD or Stopping Sight Distance = Breaking Distance+Lag Distance. Breaking distance is defined as the distance traveled after applying brake till the vehicle stops & Lag distance is defined as the distance travelled by the vehicle before applying the break and after seeing the object.

How to calculate Stopping Sight Distance?

The Stopping Sight Distance formula is defined as the minimum sight distance available on a highway at any spot having sufficient length to enable the driver to stop a vehicle traveling at design speed, safely without collision with any other obstruction is calculated using Stopping Sight Distance = Breaking Distance+Lag Distance. To calculate Stopping Sight Distance, you need Breaking Distance (BD) & Lag Distance (LD). With our tool, you need to enter the respective value for Breaking Distance & Lag Distance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Stopping Sight Distance?

In this formula, Stopping Sight Distance uses Breaking Distance & Lag Distance. We can use 4 other way(s) to calculate the same, which is/are as follows -

Stopping Sight Distance = Intermediate Sight Distance/2
Stopping Sight Distance = Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction)
Stopping Sight Distance = Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction+Difference in Elevation)
Stopping Sight Distance = Speed of Slow moving vehicle*Break Reaction Time+(Speed of Slow moving vehicle^2)/(2*[g]*Design Coefficient of Friction*Overall Efficiency from Shaft A to X)

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